| Acronym | Definition |
|---|
| HGS | Hinduja Global Solutions (Hinduja Group) |
| HGS | Human Genome Sciences, Inc. (Rockville, Maryland) |
| HGS | Hizli Geçis Sistemi (Turkish: Rapid Transit System) |
| HGS | Hampstead Garden Suburb (UK) |
| HGS | Hitachi Global Storage |
| HGS | High Datarate Gateway Switch |
| HGS | Harvard Graphics |
| HGS | Houston Geological Society (Houston, TX; est. 1923) |
| HGS | Handsworth Grammar School (UK) |
| HGS | Halifax Grammar School (Halifax, Canada) |
| HGS | Hydrogen Generation System (various companies) |
| HGS | High Specific Gravity Solids |
| HGS | Hangars |
| HGS | Heads Up Guidance System |
| HGS | Harrogate Grammar School (Yorkshire, England) |
| HGS | Heckmondwike Grammar School (UK) |
| HGS | Harrold-Gupta-Soffa (testing algorithm) |
| HGS | Haig Girls' School (Singapore primary school) |
| HGS | Haig Girls' School (Singapore) |
| HGS | Hot Gay Sex |
| HGS | Harvey Grammar School (Folkestone, Kent, England) |
| HGS | Hrvatski Golf Savez (Croatian Golf Association) |
| HGS | Henry George School of Social Sciences |
| HGS | Helicopter Gunship |
| HGS | Helicopter Generation Squadron |
| HGS | Hutsonville Grade School (Illinois) |
| HGS | Huntingdon Grammar School (UK) |
| HGS | Hypergamous Genetic Search |
| HGS | Hyperostosis Generalisata with Striations |